ALTA/LITTLE COTTONWOOD CANYON HRRR-DERIVED FORECAST GUIDANCE *************************************************************** * THIS IS AN EXPERIMENTAL, AUTOMATED, AND UNOFFICIAL FORECAST * *************************************************************** CREATED/MAINTAINED BY THE STEENBURGH GROUP DEPARTMENT OF ATMOSPHERIC SCIENCES UNIVERSITY OF UTAH Contact: jim.steenburgh@utah.edu WETBULBZERO, 1H QPF, ACCUM QPF DIRECTLY FROM HRRR COLLINS SNOW RATIO/H2O, MT BALDY T/RH, MT BALDY WIND, 1H SNOW, and ACCUM SNOW based on machine learning including UU RF SLR algorithm Based on 12Z 18-Mar-2025 intialized HRRR FORECAST HOURS 0-48 FHR VALID MOUNTAIN TIME COLLINS T MT BALDY T/RH MT BALDY WIND WETBULBZERO SLR/H2O 1H QPF / 1H SNOW / ACCUM QPF / ACCUM SNOW 0 06 AM Tue Mar 18 2025 15F 8F / 96% NW 23 G 37 MPH 4500 FT 14:1 / 7% 0.00" / 0.0" 0.00" / 0.0" 1 07 AM Tue Mar 18 2025 15F 8F / 93% WNW 26 G 41 MPH 4300 FT 15:1 / 7% 0.03" / 0.4" 0.03" / 0.4" 2 08 AM Tue Mar 18 2025 13F 7F / 92% WNW 34 G 49 MPH ≤ KSLC 14:1 / 7% 0.08" / 1.1" 0.11" / 1.5" 3 09 AM Tue Mar 18 2025 11F 4F / 90% NW 36 G 55 MPH ≤ KSLC 12:1 / 8% 0.08" / 1.0" 0.19" / 2.5" 4 10 AM Tue Mar 18 2025 10F 5F / 88% NW 34 G 51 MPH ≤ KSLC 13:1 / 8% 0.05" / 0.6" 0.24" / 3.1" 5 11 AM Tue Mar 18 2025 11F 5F / 91% WNW 30 G 45 MPH ≤ KSLC 14:1 / 7% 0.02" / 0.3" 0.26" / 3.4" 6 12 PM Tue Mar 18 2025 13F 5F / 93% WNW 28 G 46 MPH ≤ KSLC 14:1 / 7% 0.02" / 0.3" 0.28" / 3.7" 7 01 PM Tue Mar 18 2025 15F 5F / 93% WNW 29 G 44 MPH ≤ KSLC 14:1 / 7% 0.05" / 0.7" 0.33" / 4.4" 8 02 PM Tue Mar 18 2025 15F 6F / 94% WNW 29 G 42 MPH 4300 FT 14:1 / 7% 0.03" / 0.4" 0.36" / 4.8" 9 03 PM Tue Mar 18 2025 16F 6F / 100% WNW 26 G 42 MPH ≤ KSLC 14:1 / 7% 0.07" / 1.0" 0.43" / 5.8" 10 04 PM Tue Mar 18 2025 17F 6F / 98% WNW 27 G 42 MPH ≤ KSLC 15:1 / 7% 0.02" / 0.3" 0.45" / 6.1" 11 05 PM Tue Mar 18 2025 15F 6F / 93% WNW 28 G 46 MPH ≤ KSLC 14:1 / 7% 0.04" / 0.6" 0.49" / 6.7" 12 06 PM Tue Mar 18 2025 12F 4F / 95% WNW 30 G 47 MPH ≤ KSLC 12:1 / 8% 0.05" / 0.6" 0.54" / 7.3" 13 07 PM Tue Mar 18 2025 11F 3F / 97% WNW 29 G 44 MPH ≤ KSLC 13:1 / 8% 0.10" / 1.3" 0.64" / 8.6" 14 08 PM Tue Mar 18 2025 9F 2F / 92% WNW 25 G 39 MPH ≤ KSLC 14:1 / 7% 0.12" / 1.7" 0.76" / 10.3" 15 09 PM Tue Mar 18 2025 10F 3F / 92% NW 27 G 41 MPH ≤ KSLC 12:1 / 8% 0.14" / 1.7" 0.90" / 12.0" 16 10 PM Tue Mar 18 2025 8F 1F / 93% NW 26 G 41 MPH ≤ KSLC 13:1 / 8% 0.02" / 0.3" 0.92" / 12.3" 17 11 PM Tue Mar 18 2025 7F 2F / 96% NW 24 G 38 MPH ≤ KSLC 15:1 / 7% 0.00" / 0.0" 0.92" / 12.3" 18 12 AM Wed Mar 19 2025 7F 1F / 94% NW 26 G 39 MPH ≤ KSLC 15:1 / 7% 0.00" / 0.0" 0.92" / 12.3" 19 01 AM Wed Mar 19 2025 7F 1F / 95% NW 21 G 36 MPH ≤ KSLC 16:1 / 6% 0.00" / 0.0" 0.92" / 12.3" 20 02 AM Wed Mar 19 2025 7F 2F / 96% NW 21 G 33 MPH ≤ KSLC 17:1 / 6% 0.00" / 0.0" 0.92" / 12.3" 21 03 AM Wed Mar 19 2025 7F 3F / 85% NW 19 G 33 MPH ≤ KSLC 19:1 / 5% 0.00" / 0.0" 0.92" / 12.3" 22 04 AM Wed Mar 19 2025 6F 2F / 85% NW 22 G 32 MPH ≤ KSLC 20:1 / 5% 0.00" / 0.0" 0.92" / 12.3" 23 05 AM Wed Mar 19 2025 5F 1F / 89% SE 19 G 28 MPH ≤ KSLC 21:1 / 5% 0.00" / 0.0" 0.92" / 12.3" 24 06 AM Wed Mar 19 2025 4F 1F / 89% SE 18 G 26 MPH ≤ KSLC 20:1 / 5% 0.00" / 0.0" 0.92" / 12.3" 25 07 AM Wed Mar 19 2025 4F 1F / 85% NW 18 G 26 MPH ≤ KSLC 21:1 / 5% 0.00" / 0.0" 0.92" / 12.3" 26 08 AM Wed Mar 19 2025 4F 1F / 80% NW 16 G 24 MPH ≤ KSLC 21:1 / 5% 0.00" / 0.0" 0.92" / 12.3" 27 09 AM Wed Mar 19 2025 4F 2F / 76% NW 16 G 24 MPH ≤ KSLC 20:1 / 5% 0.00" / 0.0" 0.92" / 12.3" 28 10 AM Wed Mar 19 2025 8F 5F / 70% SE 14 G 21 MPH ≤ KSLC 19:1 / 5% 0.00" / 0.0" 0.92" / 12.3" 29 11 AM Wed Mar 19 2025 11F 7F / 64% SE 15 G 18 MPH ≤ KSLC 18:1 / 6% 0.00" / 0.0" 0.92" / 12.3" 30 12 PM Wed Mar 19 2025 15F 8F / 60% NW 14 G 18 MPH ≤ KSLC 17:1 / 6% 0.00" / 0.0" 0.92" / 12.3" 31 01 PM Wed Mar 19 2025 18F 9F / 82% NW 10 G 14 MPH ≤ KSLC 18:1 / 6% 0.00" / 0.0" 0.92" / 12.3" 32 02 PM Wed Mar 19 2025 19F 10F / 90% NW 8 G 13 MPH 4300 FT 18:1 / 6% 0.00" / 0.0" 0.92" / 12.3" 33 03 PM Wed Mar 19 2025 20F 11F / 88% WNW 9 G 10 MPH 4300 FT 19:1 / 5% 0.00" / 0.0" 0.92" / 12.3" 34 04 PM Wed Mar 19 2025 21F 12F / 88% WNW 9 G 11 MPH 4400 FT 16:1 / 6% 0.00" / 0.0" 0.92" / 12.3" 35 05 PM Wed Mar 19 2025 20F 14F / 76% WNW 11 G 15 MPH 4700 FT 15:1 / 7% 0.00" / 0.0" 0.92" / 12.3" 36 06 PM Wed Mar 19 2025 19F 15F / 60% W 12 G 18 MPH 4600 FT 13:1 / 8% 0.00" / 0.0" 0.92" / 12.3" 37 07 PM Wed Mar 19 2025 20F 17F / 51% W 15 G 20 MPH 4500 FT 13:1 / 8% 0.00" / 0.0" 0.92" / 12.3" 38 08 PM Wed Mar 19 2025 15F 14F / 52% W 15 G 23 MPH 4400 FT 11:1 / 9% 0.00" / 0.0" 0.92" / 12.3" 39 09 PM Wed Mar 19 2025 15F 15F / 51% W 17 G 23 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.92" / 12.3" 40 10 PM Wed Mar 19 2025 17F 17F / 42% W 19 G 27 MPH ≤ KSLC 12:1 / 8% 0.00" / 0.0" 0.92" / 12.3" 41 11 PM Wed Mar 19 2025 18F 18F / 34% W 18 G 26 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.92" / 12.3" 42 12 AM Thu Mar 20 2025 18F 18F / 43% WSW 19 G 28 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.92" / 12.3" 43 01 AM Thu Mar 20 2025 18F 17F / 43% WSW 18 G 29 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.92" / 12.3" 44 02 AM Thu Mar 20 2025 19F 16F / 72% SW 18 G 29 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.92" / 12.3" 45 03 AM Thu Mar 20 2025 21F 19F / 58% SW 20 G 34 MPH ≤ KSLC 11:1 / 9% 0.00" / 0.0" 0.92" / 12.3" 46 04 AM Thu Mar 20 2025 21F 19F / 45% SSW 24 G 39 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.92" / 12.3" 47 05 AM Thu Mar 20 2025 20F 19F / 46% SSW 23 G 41 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.92" / 12.3" 48 06 AM Thu Mar 20 2025 20F 18F / 45% SSW 25 G 41 MPH ≤ KSLC 10:1 / 10% 0.00" / 0.0" 0.92" / 12.3"